The temperatures in Saint Helens in August are quite cold with temperatures between 7°C and 12°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Saint Helens during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Saint Helens in August 2025.
If you’re planning to visit Saint Helens in the near future, we highly recommend that you review the 14 day weather forecast for Saint Helens before you arrive.
Temperatures
12° / 7°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
74
mm
Sun Hours
6.2
Hrs
